文献类型：期刊文献

英文题名：Effects of stand density on soil microbial community composition and enzyme activities in subtropical Cunninghamia lanceolate (Lamb.) Hook plantations

作者：Wang, Chaoqun[1,2,3,5] Xue, Lin[4] Dong, Yuhong[1,2,3] Jiao, Ruzhen[1,2,3]

第一作者：Wang, Chaoqun

通信作者：Jiao, RZ[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[3]State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[4]Univ Gottingen, Fac Geosci & Geog, D-37077 Gottingen, Germany;[5]Univ Gottingen, Dept Biogeochem Agroecosyst, D-37077 Gottingen, Germany

年份：2021

卷号：479

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;EI(收录号：20203809194485);Scopus(收录号：2-s2.0-85090921157);WOS:【SCI-EXPANDED(收录号:WOS:000592035600001)】；

基金：The work was supported by the State Key Research Development Program of China (2016YFD0600300) and Central Public-Interest Scientific Institution Basal Research Fund Program (CAFYBB2018SY001).

语种：英文

外文关键词：Planting density; Enzyme activity; Bacterial community; Fungal community

摘要：Despite recent improvements in understanding the composition of microbial communities in forest soils, fundamental questions regarding how their dynamics and function vary with forest management strategies, such as stand density, and the factors that affect them are still unclear. In this study, the spectrophotometry and highthroughput sequencing technology were used to determine enzyme activities and microbial community composition in the topsoil (0-20 cm) of 35-year-old Chinese fir plantations with five stand densities. The results showed that stand density had significant effects on soil fungal community composition and diversity and the activity of catalase and sucrase. However, stand density had no significant effects on the bacterial communities, although the diversity of the bacterial communities varied with stand density. Overall, the increase in stand density reduced the activities of catalase, urease and surase and the Chao1 and Shannon diversity of bacterial and fungal communities. We found that positive correlations between enzyme activities and microbial diversity indices were significant. We also found that bacterial community compositions were significantly influenced by pH, alkali available N, available P and available K, and that fungal community composition was significantly influenced by pH, soil moisture, total N, alkali available N, available P and available K. Our results provide important insights into the effect of stand density on soil enzyme activities and microbial community composition, which is certainly significant for developing stand density regulation strategies to mitigate the effects of degradation of soil biological activities.